The Chronicle’s Gwen Knapp wrote this about the tweet in a column today:

The comment might have made history. It’s hard to tell. The Baseball Encyclopedia doesn’t keep track of players’ spontaneous statements about inherently antigay humor. But McCarthy’s insight was certainly rare…

McCarthy pointed out the joke is usually telegraphed by placing the two guys at the end of the routine. There is no way it’s an attempt to include gay and lesbian couples in the frivolity of “Kiss Cam.”

“There’s that stupid, little comedic value of it if you don’t really think about what it implies,” he said Tuesday. “It kind of got old on that level. Then I actually started thinking about why we were supposed to be laughing, and it bugged me.